To use twirssi, create a symlink in the irssi scripts directory:

 $ mkdir ~/.irssi/scripts
 $ ln -sf /usr/local/share/twirssi/twirssi.pl ~/.irssi/scripts

In order to shorten URLs, it's advised to install p5-WWW-Shorten
and set twirssi_always_shorten and short_url_provider accordingly.
